NASCAR's Greg Biffle on fuel conservation

Driver Greg Biffle discusses how NASCAR teams are dealing with the switch to electronic fuel-injection after 63 years of carburetors.

http://archive.delmarvanow.com/VideoNetwork/1492043212001/NASCAR-s-Greg-Biffle-on-fuel-conservationrtmp://cp17277.edgefcs.net/ondemand/&mp4:Brightcove/29906170001/29906170001_1490329852001_03-05-biffle.mp4http://archive.delmarvanow.com/VideoNetwork/1492043212001/NASCAR-s-Greg-Biffle-on-fuel-conservationhttp://videos.usatoday.net/29906170001/29906170001_1490329904001_th-1490325438001.jpgNASCAR's Greg Biffle on fuel conservationDriver Greg Biffle discusses how NASCAR teams are dealing with the switch to electronic fuel-injection after 63 years of carburetors.27Greg BiffleNASCARsportsMotor Sportssports general02:51